Precise predictions for chargino and neutralino pair production in $e^+e^-$ annihilation

Details Precise predictions for chargino and neutralino pair production in $e^+e^-$ annihilation Precise predictions for chargino and neutralino pair production in $e^+e^-$ annihilation

2005-04-14

arxiv.org/abs/hep-ph/0504109v1

Phys.Rev. D71 (2005) 115002

Physics

High Energy Physics

High Energy Physics - Phenomenology

21 pages, 13 figures

Scientific paper

10.1103/PhysRevD.71.115002

We present a high precision calculation of chargino and neutralino pair production at $e^+e^-$ colliders. Within the Minimal Supersymmetric Standard Model, the full one-loop and higher order QED corrections are included. Special care has been taken in the definition of the Lagrangian input parameters. Furthermore, the proper inclusion of QED corrections and the separation of weak and QED corrections are discussed. We show numerical results for total cross sections, as well as forward-backward and left-right asymmetries for the SPS1a' scenario as proposed in the SPA project. The complete corrections are about 10% and in some cases even larger, in particular for $\neu_i \neu_j$ production with sizeable higgsino components. These corrections have to be taken into account in a high precision analysis.

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